EP2322447A1 - Attachment for a container and container - Google Patents

Abstract

The attachment (10) has a circular outer wall (12) with the radial inward-facing running wall sections (18,20). Multiple apertures (14) are formed in the outer wall, which extend partially in the radial inward-facing running wall sections. A rod is run along a helical line, and a center axis (16) of the helical line runs coaxially to the center axis of the outer wall. The attachment is made of low density polyethylene, high density polyethylene, polypropylene or plastic. An independent claim is included for a container with an opening locked by an attachment.

Description

The invention relates to an attachment for a container comprising a circumferential outer wall with a radially inwardly extending wall portion, wherein on the outer wall a plurality of apertures is formed, which extend partially in the radially inwardly extending wall portion, and wherein in the region of the openings radially inwardly projecting webs are formed, wherein preferably the radial extent of the webs at most corresponds to the radial extent of the openings in the radially inwardly extending wall portion. Furthermore, the invention relates to a container comprising a closable by means of an essay opening.

Such an essay and such a container are, for example, by the US 5,960,837 known. It describes a vacuum canister for collecting waste, in particular organic waste from a patient. The canister comprises a receptacle designed as a bucket and a cap designed as a lid, wherein the lid can be latched to the bucket. As a latching means formed in the lid breakthroughs cooperate with a skirt on the edge of the bucket.

When closing containers are not just locking the lid and bucket as in the US 5,960,837 into consideration, but it is also possible to bolt the container and the essay together. In such screw caps, the attachment is usually screwed via an internal thread formed on the attachment with an external thread formed on the container. The internal thread can basically also be formed on the container and the external thread on the attachment.

However, the manufacture of such containers and attachments threaded is manufacturing technically complex, especially if they are made of plastics or other liquid in the production stage materials and manufactured by injection or die casting. In these methods, voids between a first die (first mold half) and a second die (second mold half) form the mold which, for example, is filled by the liquid plastic material during injection molding. After solidification of the plastic, the two matrices are separated from each other and there is the corresponding molded article, also called spray or molding.

Due to the fact that parts of the threads of a continuous internal or external thread, which has more than a full revolution (360 °), with respect to the running in the axial direction of the thread Entformungsrichtung undercuts, have in Injection molding of threads special methods of demolding can be applied.

For example, it is possible to rotate the two matrices during demolding against each other. However, this usually requires a complex moving mechanism of the mold halves, such as e.g. a rotating support of the mold halves and a drive to allow such rotational movement sequences.

Furthermore, it is in principle possible to provide slides which are displaceable relative to the respective mold half and are thus moved back before the separation of the two mold halves in order to enable obstacle-free demolding. This variant is also technically complex and characterized by complex sliding mechanics.

Finally, the sprue can be pulled out by applying correspondingly large forces from a mold half with undercuts when the sprue has been made of a sufficiently elastic material and a corresponding thread geometry, in particular the geometry of a round thread has been selected. However, this method is due to the high effort and the restriction to a few thread geometries not easily accomplish and also involves the risk of permanently damaging the molding.

Object of the invention

It is therefore an object of the present invention to provide a simple and inexpensive to produce essay, which is sealingly connectable to a container, and to provide a simple and inexpensive to produce container that is sealingly connected or screwed with an essay.

Brief description of the invention

According to a first aspect, this object is achieved in that an article of the type mentioned above is provided, which is characterized in that the webs run along at least one helix, wherein a central axis of the helix extends coaxially to a central axis of the outer wall.

Due to the fact that the spirally arranged and thus thread-forming webs at most as far radially inward, i. to the central axis of the essay toward, extend as the parts of the opening, which extend into the likewise radially inwardly oriented wall portion, the attachment is formed in the axial direction without undercuts. Consequently, such an attachment can be translationally demolded, although a thread is provided which would typically require a rotary demolding. Thus, the associated with the injection or die casting process tool costs and the cycle times for the production of essays can be significantly reduced. The article according to the invention can be used not only with catchy but also in connection with multi-threaded threads, i. with threads that have multiple threads (notches). In principle, negligible transgressions of the radial extent of the webs over the radial extent of the inwardly oriented wall sections are also possible. Resulting slight undercuts are negligible in the context of the invention, if the corresponding essays are nevertheless translationally demoldable. The same also applies to a negligible extension of the webs in the circumferential direction beyond the extent of the openings.

In order to guarantee the undercut freedom in the essay, no webs are formed on the inside of the outer wall in the areas between each two openings. The webs arranged in the manner of a spindle along the helix thus form a multiple interrupted line Threaded tip, which can engage in the thread (thread root) of a counter thread.

However, an attachment according to the invention with a female thread formed segment-wise and without undercuts can easily be fitted with a container which is a conventional, i.e. continuous counter thread (here: external thread) has, cooperate. The prerequisite for trouble-free interaction is, of course, that the thread pitches, the number of threads etc. fit together.

According to a second aspect, the object is achieved by a container of the type mentioned, which is characterized in that in the region of the opening radially outwardly projecting webs are formed, which extend along at least one helix. The container has in the region of the opening, for example, a circular cylindrical or conically circular container wall, on which the webs along the at least one helical line can be formed. The container wall may be, for example, a bucket wall or the sidewall of a can.

If the helix of a thread rotates more than one full revolution (360 °) or several helical threads of a multi-start thread are provided, which are at least partially offset in the axial direction, peripheral regions result in which helix sections overlap in the circumferential direction of the container , According to the invention, the webs running along the at least one helical line can be arranged in the circumferential direction such that there is no overlapping of the webs in the circumferential direction. This allows demolding of such a container in the axial direction, although a thread is provided which would typically require a rotational or other elaborate Entformungsmethoden. In an axial or translational demoulding associated with the injection or die casting process tool costs and the Cycle times for the production of containers are significantly reduced. As described above, the container according to the invention can be used not only in connection with catchy threads but also with multi-thread threads, ie with threads having multiple threads (notches).

It is possible that a container according to the invention with a segment-wise and undercut-free external thread cooperates with an attachment which is a conventional, i. continuous counter thread (here: internal thread) has. It goes without saying that, if appropriate, attachments according to the invention can also cooperate with containers according to the invention. This is especially the case when e.g. the extent of the webs on an article according to the invention in the circumferential direction is regularly greater than the distance between the webs on a container according to the invention. A cooperation according to the invention is of course also possible if the extent of the webs on a container according to the invention in the circumferential direction is greater than the corresponding distances of the webs on an article according to the invention. In the interaction of an attachment according to the invention with a container according to the invention, different sealing elements, such as e.g. a cup seal or labyrinth seal between the container and the essay are introduced. In a correspondingly strong mutual screwing the essay and the container then a particularly high tightness can be achieved.

The attachment according to the invention can be for example a cover, a closure, a cartridge nozzle or the like. As a container such as buckets, cans, canisters or the like in question. The apertures formed on the attachment are holes or recesses in the respective wall, ie the outer wall of the attachment. The webs forming the thread and arranged along the helical helix are in the case of the attachment radially inward (toward the center of the attachment) protruding segments or sections. In the case of the container, the webs are radially outward out. In principle, an arrangement of the webs on the attachment radially to the outside or on the container radially inward is possible. The helix of the attachment and / or the container can be wound clockwise or counterclockwise. As a result, the attachment or the container for special technical applications that require different Gewindelrichtrichtungen used.

According to the invention, the webs can also be arranged on the attachment and / or the container along a plurality of coaxial coaxial lines of a multi-thread thread or along several helical line sections of a single-thread thread. The coaxial course of the helix to a central axis of the outer wall or the skirt is typically understood to mean the coincidence of the central axis of the helix with the central axis of the circumferential outer wall or apron. A helix is understood to mean a spiral or helix in the form of a helix.

Preferred embodiments of the invention

Particularly preferred is an embodiment of the attachment or the container in which the outer wall of the attachment or the container in the circumferential direction has a plurality of circumferential sections, the webs each follow a common helical section. As a result, a simple and quick screwing of the attachment or the container to the respective mating thread is possible. Under all-round section of the outer wall is here understood a planar edge arc area of for example 90 ° or 120 ° along the outer wall in the circumferential direction. Correspondingly, a circumferential edge area of, for example, 90 ° or 120 ° on the container, in particular on an apron of the container, is also understood to mean a circumferentially extending portion of the container. The webs of different such sections are typically different helical lines of one Associated with multi-thread, but may also be assigned to several helical sections of a catchy thread.

Furthermore, an embodiment of the attachment or of the container is particularly preferred in which webs which run along a first helix section and webs which run along a second helix section offset in the axial direction to the first helix section alternate in the circumferential direction. A trained according to this embodiment essay or trained container has a particularly stable seat on the respective counterpart and can be removed in the axial direction translationally. For the purposes of the invention, a helix section is understood to mean a segment of a helix, i. a radial portion of the helix, e.g. extending over 45 ° or 60 °. A circumferentially alternate arrangement of the webs according to this embodiment is e.g. with multi-thread threads with several helices. Here the mutually arranged webs helical sections of different helices are assigned. However, it is also possible in principle that the mutually offset helical sections belong to a common helix.

For example, in the case of a container or attachment designed according to this embodiment, two helical sections (helical sections originating from a contiguous helical line or two helixes) overlap in the circumferential direction, so, viewed in the circumferential direction, first a first bridge is formed on the first helical section, then a second one Bridge on the second helical section, a third bridge in turn on the first helix section, etc. This ends the first bridge seen in the circumferential direction at the latest at the beginning of the second bridge and the third bridge begins at the earliest at the end of the second bridge, etc.

Another example of a container or attachment formed according to this embodiment is a container or attachment having three axially adjacent helical sections (which in turn may be from a single continuous helix or from, for example, three interleaved independent helices) along which the bridges circumferentially alternately are arranged: A first web runs along a first helix section. A second web extends in this case along a second helix section, which is axially offset from the first helical section, wherein the second bridge is offset in the circumferential direction with respect to the first web and begins in the circumferential direction at the earliest where the first web ends. A third land extends along a third helix section axially offset from the first and second helix sections, the third land being circumferentially offset from the first land and the second land, and the third land beginning at the earliest where the second land Footbridge ends. A fourth web then in turn runs along the first helix section, which begins at the earliest in the circumferential direction, where the third bridge ends. With such an arrangement of the webs on the container undercuts of parts of webs or webs in the axial direction (ie, the Entformungsrichtung of the container) are excluded, although the formation of a thread on a container without the plurality of segmented webs, would require a rotational demolding ,

Unlike in the two above examples with an assignment of the webs to the two or three helical sections in a fixed predetermined alternating sequence, it is also possible that the assignment of the webs to the helical sections does not occur regularly alternately, in particular also a random Assignment of successive webs to the helical sections can be selected.

Preferred is an embodiment of the container, wherein the container in the region of the opening has a circumferential skirt, wherein the radially outwardly projecting ridges are formed on the skirt, and wherein a center axis of the helix is coaxial with a center axis of the skirt. An apron gives the container greater stability and rigidity, especially in the area of the opening of the container. Thus, a secure screwing is possible without the container deformed too much. The skirt may be cylindrical or conical in this embodiment of the container.

Also preferred is a development of the preceding embodiment, wherein the skirt has a radially outwardly extending wall portion in which the apron a plurality of openings is formed, which extend partially in the radially outwardly extending wall portion, wherein the webs in Area of the apertures are formed, and in which the radial extent of the webs preferably corresponds at most to the radial extent of the openings in the radially outwardly extending wall portion.

Since the helically extending or arranged and thus forming a thread webs at most as far radially outward, ie away from the central axis of the container, as the parts of the opening, which extend into the likewise radially outwardly oriented wall portion, that is Container formed in the axial direction without cropping. In order to guarantee the undercut freedom in the container, the webs typically formed in the region of a respective, circumferentially extending edge of the apertures on the outside of the skirt in the areas between two openings are not continuous, so that arranged by the spindle-like along the helical line webs forms a thread crest, which is repeatedly interrupted in the helical direction according to the number of webs or the number of openings. The apertures formed on the container are holes or recesses in the respective wall, ie the apron of the container. The radially outwardly extending wall portion of the skirt can Of course, only with a component radially outward show, so in particular in the axial direction obliquely radially outward.

Likewise preferred is an embodiment of the container in which at least one stop for a web of an attachment is provided at the end of the at least one helix facing away from the opening of the container. A special attachment with a plurality of inwardly projecting webs, which are formed in a plane perpendicular to the center axis of the article, can then be screwed into the container according to this embodiment in the manner of a bayonet closure until the web or webs on the stop or on the stops nudge. If the container has a plurality of (e.g., four) helix sections which are evenly distributed over the round opening of the container, and the special attachment corresponding to e.g. four webs, so the special attachment can be turned on the trained according to this embodiment container and comes at the end of the respective helical sections to a defined stop. The length of the webs formed on the special attachment is typically greater than the respective intermediate regions (spacings) between two webs on the container, so that when the special attachment is screwed onto the container, the attachment can not slip through the intermediate regions. The helix sections for guiding the webs of the attachment can only extend along a portion of one full turn (360 °) or extend beyond a full turn (360 °) so that the helix sections partially overlap.

If the webs formed directly in front of the stop or stops of the container do not run in the helical direction, but at least in one subsection exclusively in the circumferential direction, the risk of turning back the attachment from a screwed-in position, in which the webs rest against the stop, is reduced. Preferably, the webs of the essay of the top surface of the essay are slightly less widely spaced as the edge of the opening of the container of the running in the circumferential direction of the container part of the webs, so that when screwing the article up to the attacks of the container, the essay and the container against each other are secured against each other.

The webs of the attachment and / or the container preferably have a round and / or a sawtooth and / or a trapezoidal shape in the radial section. These web geometries have proven themselves in practice. The cross-sectional geometry of the web can also take the form of a flat thread. In principle, any shapes of the webs in the radial section are possible. The webs can also be designed such that they have a bias voltage. It is also conceivable that not all webs of an essay or container have the same shape, or that differently shaped webs are formed on the attachment and on the container.

In another preferred embodiment, the webs in particular designed as a barb retaining devices for irreversible screwing an essay with a container or vice versa. The restraint devices allow the mutual irreversible securing of a container according to the invention against an attachment according to the invention during screwing, whereby optionally the formation of restraint devices either on the attachment or on the container is sufficient. In this case, the barbs or retaining devices initially allow the attachment to pass the container in the closing direction. By contrast, in the opposite direction, the restraints prevent the attachment from rotating relative to the container.

If the container has an all-round attachment rim which extends radially outward from the container wall and on which an attachment comes to lie with its lower edge in the screwed state, then such an attachment, which has retention devices formed on the webs, can be so powerful This container will be screwed on that Container and the essay are irreversibly braced against each other. The restraints then prevent the attachment from detaching from the container from this condition. Such a mutual tension is possible even in containers without a circumferential Aufsetzrand. If the attachment is slightly rotated beyond the state of the screwed connection, against which the attachment abuts with its cover surface against the circumferential upper edge of the container, then the container and the attachment are likewise braced against one another.

Furthermore, an embodiment of the attachment or of the container is preferred, in which the webs have in particular retaining devices designed as barbs for retaining an attachment screwed to the container counter to the closing direction, wherein the retention devices can be released by applying a pressure or tension in the radial direction. Also, the article formed according to this embodiment essay or the container formed according to this embodiment can remain translationally demoulded. It is understood that the retaining devices can solve a back-up of the attachment to the container when applying a pressure or train and this will not be solved even by the container or attachment.

The retaining devices are formed, for example, as barbs on the webs of an essay or container, wherein the thickness of the barbs in the radial direction relative to the radial extent of the webs is reduced, in particular almost halved. The barbs thus formed thin are arranged on the container such that they each extend flush with the outside of the webs. As a result, free spaces are formed between the thin barbs and the container wall or between the thin barbs and an apron of the container in the radial direction. At the top of the thin barbs are arranged so that they each run flush with the inside of the webs. Thus, free spaces between the thin barbs and the openings on the outer wall of the attachment also form here in the radial direction.

If such an attachment is screwed onto a container with thin barbs with thin barbs, the barbs snap into each other when a specific rotational position is exceeded. In this state, the barbs abut each other via contact surfaces and can not be easily moved past each other. Only by local impressions of the essay at the point at which the web is formed with thin barbs, the contact surfaces slide past each other, so that the barbs of the essay in the container clearances and the barbs of the container in the essay clearances intervene and untwisting the essay contrary to the closing direction is possible again. For this purpose, the webs on the essay opposite the container outer wall, as well as the webs on the container outer wall relative to the essay inner wall must leave enough space to allow a local impressions can.

Typically, webs are formed with such thin or narrow retaining devices on the attachment or container diametrically opposite. In this case, to open a sealed container at these two points of the essay must be pressed radially inward to release the child safety and then perform a rotational movement of the essay.

The attachment and / or the container may be made of Low Density Polyethylene (LDPE), High Density Polyethylene (HDPE), Polypropylene (PP) or other plastic. When these plastics are used from the family of polyolefins, the article or container is given many advantageous properties, e.g. a high resistance through high toughness and elongation at break values as well as a good sliding behavior with at the same time very low water absorption.

Further advantages of the invention will become apparent from the description and the drawings. Likewise, those mentioned above and even further executed features according to the invention each individually or for several in any combination use. The embodiments shown and described are not to be understood as exhaustive enumeration, but rather have exemplary character for the description of the invention.

Drawing and detailed description of the invention

Fig. 1

einen erfindungsgemäßen Aufsatz in einer Seitenansicht;

Fig. 2

den Aufsatz aus Fig. 1 in der Draufsicht;

Fig. 3

den Aufsatz aus Fig. 1 in einer perspektivischen Unteransicht; und

Fig. 4

den Aufsatz aus Fig. 1 in einer perspektivischen Draufsicht.

Fig. 5

ein erfindungsgemäßes Behältnis und ein erfindungsgemäßer Aufsatz in einer Seitenansicht;

Fig. 6

ein erfindungsgemäßes Behältnis mit einer Schürze und dem Aufsatz aus Fig. 5 in einer Seitenansicht;

Fig. 7

ein erfindungsgemäßes Behältnis mit einem Aufsetzrand sowie dem Aufsatz aus Fig. 5;

Fig. 8

ein erfindungsgemäßes Behältnis mit einer konischen Schürze in einer Seitenansicht;

Fig. 9

einen erfindungsgemäßen Aufsatz und ein erfindungsgemäßes Behältnis mit Rückhaltevorrichtungen;

Fig. 10

einen erfindungsgemäßen Aufsatz und ein erfindungsgemäßes Behältnis mit einer Kindersicherung;

Fig. 11

einen Ausschnitt des Aufsatzes aus Fig. 10; und

Fig. 12

einen Ausschnitt des Behältnisses aus Fig.10.

The invention is illustrated in the drawings and will be explained in more detail with reference to embodiments. It shows:

Fig. 1

an article of the invention in a side view;

Fig. 2

the essay Fig. 1 in the plan view;

Fig. 3

the essay Fig. 1 in a perspective bottom view; and

Fig. 4

the essay Fig. 1 in a perspective plan view.

Fig. 5

an inventive container and an inventive article in a side view;

Fig. 6

an inventive container with an apron and the essay Fig. 5 in a side view;

Fig. 7

an inventive container with a Aufsetzrand and the essay Fig. 5 ;

Fig. 8

a container according to the invention with a conical skirt in a side view;

Fig. 9

an article according to the invention and a container according to the invention with retaining devices;

Fig. 10

an article of the invention and a container according to the invention with a child safety device;

Fig. 11

a section of the essay Fig. 10 ; and

Fig. 12

a section of the container Figure 10 ,

In the Fig. 1 is marked with an essay 10 having a plurality of apertures 14 at its round outer wall 12. The outer wall 12 comprises a first wall section 18 extending parallel to the central axis 16 of the circular outer wall 12 and a second radially inwardly directed (at least with a radial component towards the central axis 16) second wall section 20. The second wall section 20 directly adjoins an upper annular cover wall section 22 at.

The apertures 14 are holes in the outer wall 12 which extend in the circumferential direction 24 and in the axial direction 26 (parallel to the central axis 16), wherein the apertures 14 in both the first wall portion 18 and in the second wall portion 20 extend. The breakthroughs 14 in the Fig. 1 are all equidistant from the annular top wall portion 22 at their upper ends 28. At their lower ends 30, the openings 14 have rectilinear edges 32, which are arranged at different distances from the cover wall section 22 in the axial direction 26. The totality of a plurality of edges 32 adjacent to each other in a portion 34 (edge portion) of the outer wall 12, forms a helical section of a helical helix, wherein the edges 32 are not parallel to the lid wall portion 22, but obliquely to this and this follow the slope of the helical helix ,

The Fig. 2 shows the article 10 in plan view. As a result, the annular cover wall section 22 and a central cover surface 36 of the attachment 10 as well as the apertures 14, in particular their upper arcuate ends 28, can be seen. Furthermore, in the Fig. 2 the circular shape of the outer wall 12 is shown. In addition, in the plan view webs 38 can be seen, which are integrally formed on the outer wall 12 in the region of the edges 32 of the apertures 14 and which radially into the interior (to the center or to the central axis 16) of the attachment 10 show.

The Fig. 3 shows the article 10 in a perspective bottom view. In this case, webs 38 can be seen, which are formed on the outer wall 12 and are arranged along helical sections of different helices of a multi-start thread. Webs 38 corresponding to the circumferential position in the respective sections 34 (eg the third web 38 of a first section 34 and the third web 38 of a second section 34) are arranged at the same height, ie they have the same distance to the cover wall section 22. It is understood that the respective entirety of the webs 38 of different sections 34 may alternatively be offset from one another in the axial direction, if the sections 34 are associated with different helical sections of the same helix of a single thread.

Regardless of whether the attachment 10 is divided into different sections 34 or not, as in the present example, webs 38 that run along a first helix section and webs 38 that run along a second helix section offset in the axial direction relative to the first helix section can be used. alternate in the circumferential direction.

The webs 38, which represent no undercut because of the extent and the shape of the extension of the upper ends 28 of the respectively associated openings 14 in the radially inwardly extending wall portion 20 at a demolding in the axial direction 26 can be used as an internal thread and with a corresponding Mating thread of another component (typically a container) interact. The Webs 38 have a trapezoidal shape in a cross-section guided in the radial direction. However, rectangular, round, or saw-toothed cross-sectional shapes are also possible.

The transition in the outer wall 12 of the attachment 10 from a first, circular wall portion 18 into a second radially inwardly directed wall portion 20 is in the perspective of Fig. 4 clearly visible. Here, too, shows the helical arrangement of the webs 38. The article is made for example of low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene (PP) or another plastic.

In the Fig. 5 a container 40 and an attachment 42 is shown, wherein the container 40 has a closable by means of the attachment 42 opening 44, and wherein in the region of the opening 44 radially outwardly projecting webs 48 are formed, which extend along a helical line. The container 40 and the attachment 42 are shown in a non-bolted state. The container 40 comprises a circumferential cylindrical container wall 46, on which the webs 48 are formed pointing radially outward. The webs 48 are in the Fig. 5 is arranged along a continuous helix, said helix having two full turns (2 x 360 °) from an opening 50 facing the opening 44 to an opening 44 facing away from the end web 52. The webs 48, 50, 52 are spaced apart in the helical direction 56 each by an identical distance Z from each other.

The article 42, unlike the essay of FIGS. 1 to 4 a single continuous helix on. Along this helical line webs 58 are arranged on the top 42, wherein analogous to the FIGS. 1 to 4 Breakthroughs 54 are formed in an outer wall 59 of the attachment 42. The webs 58 extending along the helix are each spaced apart in the helical direction 56 and have a length X in the circumferential direction. The helical direction 56 is the Direction vector of a tangent applied to the helix and thus differs - albeit only slightly - from the circumferential direction.

In order to ensure a screwing of the attachment 42 into the container 40, the web length X is greater than the distance Z. In other words, the webs 58 of the attachment 42 are typically longer than the spaces between the webs 48 of the container 40, so that losing the Attachment 42 is impossible by slipping of the webs 58 in the axial direction. This can of course also be achieved if the webs 48 on the container 40 are longer than the spaces between webs 58 of the article 42nd

In the Fig. 6 a container 60 is shown with a skirt 62 in a side view. The skirt 62 serves to stabilize the container 60, is coaxial with the container wall 46 and has a cylindrical shape. The skirt 62 is formed circumferentially in the region of an opening 66 of the container 60 and formed on the container wall 46. On the skirt 62 of the container 60 webs 68 are arranged along a continuous helix, which is analogous to the helix in Fig. 5 extends along two full turns (2 x 360 °) and which is coaxial with a central axis 70 of the skirt 62. The webs 68 are also in the helical direction 72 also regularly spaced by a gap (distance) of length Z from each other.

Furthermore, in the Fig. 6 the article 42 from the Fig. 5 with the attachment 42 opposite to the illustration in FIG Fig. 5 a quarter turn was rotated about its central axis 16. As a result, the axial offset of the beginning and the end of the helix is visible on the basis of the different axial extent of two adjacent openings 74, 76. The lengths X of the webs 58 of the attachment 42 are analogous to Fig. 5 greater than the distances Z between the webs 68 on the container 60th

In the Fig. 7 an inventive container 80 is shown with a Aufsetzrand 82 for a top 42. The article 42 corresponds to the article from the Fig. 5 , On the container wall 46 of the container 80 webs 88 are arranged along a continuous helix, wherein the helix extends along two full revolutions (2x 360 °). The webs 88 are spaced apart in the helical direction 84 by gaps of length Z, wherein the webs 88 of a first helical section with respect to the webs 88 of the second, offset in the axial direction 86 helical section in the helical direction 84 are mutually offset. Thus, the ridges 88 of the different helical sections do not overlap in the circumferential direction.

In addition, the container 80 on its container wall 46, the all-round Aufsetzrand 82 which extends radially from the container wall 46 to the outside, on its upper side forms a flat support surface for the article 42 and tapers conically downwards. The attachment edge 82 is formed via radial webs 90 to the container wall 46 and forms between the radial webs 90 openings 92, seen in the axial direction 86 at least the radial extent and at least the circumferential extent of the webs 88 of the container 80 have. Thus, the container 80 is formed despite the Aufsetzrandes 82 and despite the webs 88 without undercuts. At the attachment edge 82, the screwed-on attachment 42 can be secured by screwing relative to the container 80. By screwing the attachment 42 against the resistance of the Aufsetzrandes 82 and the webs 88 (frictional resistance) of the attachment 42 is wedge-like driven between the webs 88 and the attachment edge 82 and thus braces the attachment 42 and the container 80th

The Fig. 8 shows the section of a container 100 with a conical skirt 102 which is integrally formed via an annular flange 104 to the container wall 46. On the conical skirt 102 webs 108 are formed, which are directed radially outwards (away from the central axis 103 of the skirt 102) and are arranged along a helix, wherein the Helix also tapered. Below the webs 108 openings 106 can be seen through the conical skirt 102, which allow a non-undercut removal even with a conically shaped skirt 102.

Like the attachment, the container may for example be made of low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene (PP) or another plastic.

In the Fig. 9 an attachment 110 and a container 112 is shown in a non-bolted state. The attachment 110 and the container 112 have retention devices formed on their webs 114, 116 as barbs 118, 120. In this case, the barbs 118 of the attachment 110 are formed on the webs 114 in such a way that they are oriented upwards, ie toward the top surface 122, whereas the barbs 120 of the container 112 are formed on the webs 116 in such a way that they reach down to one another Not shown container bottom are aligned. The respective inclined surfaces 124, 126 of the barbs 118, 120 are aligned such that they initially allow the attachment 110 to pass or slide past the container 112 during screwing in a circumferential direction of closure. In the opposite direction, side faces 128, 129 of the barbs 118, 120 aligned in the axial direction prevent the attachment 110 from rotating back relative to the container 112 and ensure the permanent screwing of the attachment 110.

The retaining devices, in particular the barbs 118, 120, may be formed, for example, on only one web 114, 116 of the attachment 110 or of the container 112, or also on a plurality of webs 114, 116 of the attachment 110 or of the container 112. It is also possible for a web to be realized 114,116 only one barb 118,120 or more than two barbs 118,120 are provided.

In the Fig. 10 an attachment 130 and a container 132 with a child safety device in the form of a push-turn fastener 134 is shown, which is formed on a respective web 140, 142 of the attachment 130 and the container 132. In the push-turn fastener 134 barbs 136,138 are formed on the webs 140,142 of the cap 130 and the container 132, the thickness of which is approximately halved in the radial direction relative to the radial extent of the webs 140,142. The thin barbs 136, 138 are arranged on the container 132 in such a way that they terminate flush with the outside 144 of the webs 142. As a result, free spaces 148 form between the thin barbs 138 and the container wall 146 in the radial direction. At the top 130, the thin barbs 136 are arranged so that they also terminate flush with the inner side 150 of the webs 136. Thus, free spaces 152 form between the thin barbs 136 and the openings 154 on the outer wall 156 of the attachment 130 in the radial direction.

If such an attachment 130 with thin barbs 136 screwed onto a container 132 with thin barbs 138 (in Fig. 10 not shown), so the barbs 136, 138 engage in each other when exceeding a certain rotational position. In this state, the barbs 136,138 abut against each other via abutment surfaces 158,160 extending in the axial direction and can not easily be moved past one another (secured state).

Only by local, radially inwardly directed impressions of the article 130 at the points where the webs 140 are formed with the thin barbs 136, slide the contact surfaces 158, 160 past each other, so that the barbs 136 of the article 130 in the free spaces 148 of Container 132 are moved and the barbs 138 of the container 132 engage in the free spaces 152 of the attachment 130. In this way, turning up the attachment 130 against the closing direction is made possible.

In the Fig. 11 is a section of the essay 130 from the Fig. 10 shown. Through the opening 154 on the attachment 130, a web 140 is visible on which a thin barb 136 is formed. The arrangement of the thin barb 136 at the inner end of the web 140 results in the free space 152 between the thin barb 136 and the outer wall 156 of the cap 130th

In the Fig. 12 is a section of the container 132 from Fig. 10 shown. It can be seen here that the thin barbs 138 on the container 132 are flush with the outer side 144 of the webs 142 are finally formed on the webs 142. As a result, the free spaces 148 form between the thin barbs 138 and the container wall 146 in the radial direction.

Claims (15)

Attachment (10; 42; 120; 130) for a container, comprising a circumferential outer wall (12, 59) with a radially inwardly extending wall section (20), wherein on the outer wall (12, 59) a plurality of apertures (14) is formed, which extend partially in the radially inwardly extending wall portion (20), and wherein in the region of the openings (14), radially inwardly projecting webs (38,58) are formed, wherein preferably the radial extent of the webs (38 , 58) corresponds at most to the radial extent of the openings (14) in the radially inwardly extending wall section (20),
characterized,
in that the webs (38, 58) run along at least one helix, with a central axis of the helix being coaxial with a central axis (16) of the outer wall (12, 59). Attachment (10; 42; 120; 130) according to claim 1, characterized in that the outer wall (12) in the circumferential direction has a plurality of circumferential sections (34) whose webs (38) each follow a common helical section. An attachment (10; 42; 120, 130) according to claim 1 or 2, characterized in that webs (38) extending along a first helix section and webs (38) extending along a second helix section offset in the axial direction to the helix first section , alternate in the circumferential direction (24). An attachment (10; 42; 120; 130) according to any one of the preceding claims, characterized in that the webs (38,58) in radial section have a round and / or a sawtooth-like and / or a trapezoidal shape. Attachment (122) according to one of the preceding claims, characterized in that the webs (114) in particular as barbs (124) formed retaining devices for irreversibly screwing the attachment (112) with a container (40; 60; 80; 100; 112; 132 ) exhibit. Attachment (130) according to any one of the preceding claims, characterized in that the webs (140) in particular barbs (136) formed retaining means for retaining a screwed to the container (132) attachment (130) against the closing direction, wherein the retaining devices by Applying a pressure or train in the radial direction are solvable. Attachment (10; 42; 122; 130) according to one of the preceding claims, characterized in that the attachment (10; 42) consists of low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene (PP) or another plastic is made. A container (40; 60; 80; 100; 112; 132) comprising an opening (44; 66) closable by means of an attachment (10; 42), characterized
in that in the region of the opening (44; 66) radially outwardly projecting webs (48; 68; 88; 108) are formed which run along at least one helix. Container (60; 100; 112; 132) according to claim 8, characterized in that the container in the region of the opening (66) has a circumferential skirt (62; 102) that the radially outwardly projecting Webs (68; 108) are formed on the skirt (62; 102) and that a center axis of the helix is coaxial with a central axis (70; 103) of the skirt (62; 102). A container (60; 100; 112; 132) according to claim 9, characterized in that the skirt (62; 102) has a radially outwardly extending wall portion, that a plurality of apertures (92; 106) are formed on the skirt (62,102) is partially extending in the radially outwardly extending wall portion that the webs (88; 108) in the region of the openings (92; 106) are formed, and that the radial extent of the webs (88; 108) preferably at most the radial Extension of the openings (92, 106) in the radially outwardly extending wall section corresponds. Container (40; 60; 80; 100; 112; 132) according to one of Claims 8 to 10, characterized in that the container (40; 60; 80; 100) has a plurality of circumferentially extending sections in the circumferential direction whose webs (48 ; 68; 88; 108) each follow a common helical section. A container (40; 60; 80; 100; 112; 132) as claimed in any of claims 8 to 11, characterized in that webs (48; 68; 88; 108) extending along a first helix section and webs (48; 68; 88, 108) extending along a second helical section offset in the axial direction (86) from the first helix section, alternate in the circumferential direction (24). Container (40; 60; 80; 100) according to one of Claims 8 to 12, characterized in that at least one end of the at least one helical line facing away from the opening (44; 66) of the container (40; 60; 80; Stop for a bridge of an essay is provided. Container (112) according to any one of claims 8 to 13, characterized in that the webs (116) in particular as barbs (120) formed retaining devices for irreversible screwing an attachment (10; 42; 122; 130) with the container (112) , Container (132) according to any one of claims 8 to 14, characterized in that the webs (142) in particular as barbs (138) formed retaining devices for retaining an with the container (132) screwed essay (110; 130) against the closing direction, wherein the retaining devices are detachable by applying a pressure or tension in the radial direction.

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